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 *  * or more contributor license agreements.  See the NOTICE file
 *  * distributed with this work for additional information
 *  * regarding copyright ownership.  The ASF licenses this file
 *  * to you under the Apache License, Version 2.0 (the
 *  * "License"); you may not use this file except in compliance
 *  * with the License.  You may obtain a copy of the License at
 *  *
 *  *     http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  * Unless required by applicable law or agreed to in writing,
 *  * software distributed under the License is distributed on an
 *  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  * KIND, either express or implied.  See the License for the
 *  * specific language governing permissions and limitations
 *  * under the License.
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package org.apache.iotdb.db.mpp.plan.expression.ternary;

import org.apache.iotdb.db.mpp.common.NodeRef;
import org.apache.iotdb.db.mpp.plan.expression.Expression;
import org.apache.iotdb.db.mpp.plan.expression.visitor.ExpressionVisitor;
import org.apache.iotdb.db.mpp.plan.planner.plan.parameter.InputLocation;
import org.apache.iotdb.db.mpp.transformation.dag.memory.LayerMemoryAssigner;
import org.apache.iotdb.db.mpp.transformation.dag.udf.UDTFExecutor;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;

import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.time.ZoneId;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

public abstract class TernaryExpression extends Expression {
    protected final Expression firstExpression;
    protected final Expression secondExpression;
    protected final Expression thirdExpression;
    // protected final boolean isNot = false;

    public Expression getFirstExpression() {
        return firstExpression;
    }

    public Expression getSecondExpression() {
        return secondExpression;
    }

    public Expression getThirdExpression() {
        return thirdExpression;
    }

    protected TernaryExpression(
            Expression firstExpression, Expression secondExpression, Expression thirdExpression) {
        this.firstExpression = firstExpression;
        this.secondExpression = secondExpression;
        this.thirdExpression = thirdExpression;
    }

    protected TernaryExpression(ByteBuffer byteBuffer) {
        this.firstExpression = Expression.deserialize(byteBuffer);
        this.secondExpression = Expression.deserialize(byteBuffer);
        this.thirdExpression = Expression.deserialize(byteBuffer);
    }

    @Override
    public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) {
        return visitor.visitTernaryExpression(this, context);
    }

    @Override
    public boolean isConstantOperandInternal() {
        return firstExpression.isConstantOperand()
                && secondExpression.isConstantOperand()
                && thirdExpression.isConstantOperand();
    }

    @Override
    public boolean isTimeSeriesGeneratingFunctionExpression() {
        return !isUserDefinedAggregationFunctionExpression();
    }

    @Override
    public boolean isUserDefinedAggregationFunctionExpression() {
        return firstExpression.isBuiltInAggregationFunctionExpression()
                || secondExpression.isBuiltInAggregationFunctionExpression()
                || thirdExpression.isUserDefinedAggregationFunctionExpression();
    }

    @Override
    public List<Expression> getExpressions() {
        return Arrays.asList(firstExpression, secondExpression, thirdExpression);
    }

    private void reconstruct(
            List<Expression> firstExpressions,
            List<Expression> secondExpressions,
            List<Expression> thirdExpressions,
            List<Expression> resultExpressions) {
        for (Expression fe : firstExpressions) {
            for (Expression se : secondExpressions)
                for (Expression te : thirdExpressions) {
                    switch (operator()) {
                        case "between":
                            resultExpressions.add(new BetweenExpression(fe, se, te));
                            break;
                        default:
                            throw new UnsupportedOperationException();
                    }
                }
        }
    }

    @Override
    public boolean isMappable(Map<NodeRef<Expression>, TSDataType> expressionTypes) {
        return firstExpression.isMappable(expressionTypes)
                && secondExpression.isMappable(expressionTypes)
                && thirdExpression.isMappable(expressionTypes);
    }

    @Override
    public void constructUdfExecutors(
            Map<String, UDTFExecutor> expressionName2Executor, ZoneId zoneId) {
        firstExpression.constructUdfExecutors(expressionName2Executor, zoneId);
        secondExpression.constructUdfExecutors(expressionName2Executor, zoneId);
        thirdExpression.constructUdfExecutors(expressionName2Executor, zoneId);
    }

    @Override
    public final void bindInputLayerColumnIndexWithExpression(
            Map<String, List<InputLocation>> inputLocations) {
        firstExpression.bindInputLayerColumnIndexWithExpression(inputLocations);
        secondExpression.bindInputLayerColumnIndexWithExpression(inputLocations);
        thirdExpression.bindInputLayerColumnIndexWithExpression(inputLocations);

        final String digest = toString();
        if (inputLocations.containsKey(digest)) {
            inputColumnIndex = inputLocations.get(digest).get(0).getValueColumnIndex();
        }
    }

    @Override
    public void updateStatisticsForMemoryAssigner(LayerMemoryAssigner memoryAssigner) {
        firstExpression.updateStatisticsForMemoryAssigner(memoryAssigner);
        secondExpression.updateStatisticsForMemoryAssigner(memoryAssigner);
        thirdExpression.updateStatisticsForMemoryAssigner(memoryAssigner);
        memoryAssigner.increaseExpressionReference(this);
    }

    protected abstract String operator();

    @Override
    protected void serialize(ByteBuffer byteBuffer) {
        Expression.serialize(firstExpression, byteBuffer);
        Expression.serialize(secondExpression, byteBuffer);
        Expression.serialize(thirdExpression, byteBuffer);
    }

    @Override
    protected void serialize(DataOutputStream stream) throws IOException {
        Expression.serialize(firstExpression, stream);
        Expression.serialize(secondExpression, stream);
        Expression.serialize(thirdExpression, stream);
    }
}
